Serpentine retainer spring for a receptacle rack



FIG. 1 shows a top perspective view of the serpentine retainer spring for a receptacle rack.

FIG. 2 shows a side elevation view thereof.

FIG. 3 shows a right end elevation view thereof.

FIG. 4 shows a top plan view thereof; and,

FIG. 5 shows a bottom perspective view thereof.

The dash-dash broken lines in the drawings depict environmental structure and form no part of the claimed design. The dash-dot broken lines show the boundary of the claim and form no part of the claimed design. 

CLAIM The ornamental design for a serpentine retainer spring for a receptacle rack, as shown and described. 